Upper tract tumours in patients with vesico-ureteral reflux and recurrent bladder tumours.

27 patients with recurrent low-grade, low-stage transitional cell carcinoma (TCC) of the bladder and uni- or bilateral vesico-ureteral reflux were followed for up to 18 years in order to study a possible higher incidence of TCC of the upper tract. None of the patients developed tumours of the upper collecting system during the follow-up period. Routine bladder instillations with Thiotepa may be one explanation of such a finding.